A conversion structure of an e-plane waveguide feed line and a deep groove waveguide feed line

Abstract

This invention discloses a conversion structure between an E-plane waveguide feeder and a deep groove waveguide feeder, comprising an E-plane waveguide feeder, a deep groove waveguide feeder, and a transition structure. The E-plane waveguide feeder and the deep groove waveguide feeder are arranged perpendicularly to each other, wherein the height of the deep groove waveguide feeder is higher than that of the E-plane waveguide feeder, and one end of the E-plane waveguide feeder partially overlaps with one end of the deep groove waveguide feeder to form a transition via. The transition structure is located at the end where the spacer of the deep groove waveguide feeder connects to the E-plane waveguide feeder. This invention uses an E-plane waveguide feeder, taking advantage of its zero-current characteristic, which prevents electromagnetic wave leakage during separation. The conversion to a deep groove waveguide feeder achieves electromagnetic wave conversion without welding. The turning structure of the feed network is placed on the E-plane feeder, while the radiating structure is implemented through the deep groove waveguide. The transition structure between the two feeder modes is designed to achieve efficient conversion.

Description

Technical Field

[0001] This utility model relates to a conversion structure, specifically a conversion structure between an E-plane waveguide feed and a deep groove waveguide feed, belonging to the field of antenna technology. Background Technology

[0002] Waveguide transition structures are transition devices used for efficient transmission of electromagnetic waves between different transmission lines (such as rectangular waveguides, E-plane waveguides, deep trench waveguides, microstrip lines, etc.). The following core issues need to be addressed: mode matching: differences in the field distribution of the dominant mode in different waveguides; impedance continuity: gradual change in characteristic impedance to avoid reflection; broadband characteristics: maintaining low loss within the target frequency band.

[0003] Chinese Patent Publication No. CN206134903U discloses an EH conversion waveguide device, comprising a concave upper waveguide and a lower waveguide. The semi-open cavity of the upper and lower waveguides forms an E-plane waveguide channel. A waveguide channel communicating with the surface waveguide channel is opened inside the lower waveguide. E-plane rectangular steps are provided inside the lower waveguide and at the turning point connecting the H-plane waveguide channel and the E-plane waveguide channel. H-plane rectangular step units are provided inside the upper waveguide and at the intersection of the H-plane waveguide channel and the E-plane waveguide channel. The upper edge of the rectangular step unit connects to the top surface of the surface waveguide channel, and the lower edge of the H-plane rectangular step unit connects to the top surface of the surface waveguide channel. This invention eliminates the traditional surface waveguide-to-surface transition structure. By protruding three rectangular steps at the surface-to-surface intersection, the electromagnetic wave deflection simultaneously meets the requirements of bandgap, electromagnetic compatibility, and signal leakage. This invention features a simple structure, small size, and convenient processing.

[0004] The design is simple and compact, but it requires two antenna plates to be welded together during manufacturing.

[0005] Chinese Patent Publication No. CN118610743A discloses an E-plane waveguide antenna structure, including a first structural layer, a second structural layer, and an E-plane waveguide antenna assembly. The first structural layer has an annular groove forming a first waveguide channel and multiple radiating slots, each radiating slot communicating with the first waveguide channel. The inner wall of the annular groove has multiple cylindrical sections, spaced apart to form an electromagnetic bandgap structure. The second structural layer is stacked on top of the first structural layer, and the second structural layer has a second waveguide channel. The first waveguide channel and the second waveguide channel are connected to form a waveguide cavity. The E-plane waveguide antenna assembly is located within the waveguide cavity and has a wide side and a narrow side, both perpendicular to the extension direction of the E-plane waveguide antenna assembly. The size of the wide side is greater than or equal to twice the size of the narrow side. The aforementioned E-plane waveguide antenna structure exhibits good signal transmission performance.

[0006] The E-plane waveguide antenna assembly of this scheme has a wide side and a narrow side. The wide side requires two layers of waveguide antenna plates that need to be welded together.

[0007] Chinese Patent Publication No. CN117941173A discloses an open waveguide antenna and a system having an open waveguide antenna, comprising: an electromagnetic EM transition section having a transition region, a signal feed interface, and an open waveguide section, the EM transition section being configured to couple EM energy from the signal feed interface to a pilot waveguide mode of EM energy reaching the open waveguide section via the transition region; and a leaky waveguide antenna section configured and arranged to radiate electromagnetic energy received from the open waveguide section; wherein the EM transition section is electromagnetically coupled to the leaky waveguide antenna section, and the EM transition section is configured to support the transmission of electromagnetic energy from the signal feed structure to the leaky waveguide antenna section.

[0008] This design uses a deep slot waveguide antenna, which eliminates the need for welding the feed line. However, the curved structure can cause leakage in the antenna. While the structure of this design can reduce electromagnetic wave leakage, it is impossible to manufacture and implement.

[0009] In summary, existing conventional cavity waveguide feeder EH plane impedance transformation structures require the welding of two separate plates (SMT or conductive adhesive), resulting in complex manufacturing processes and low yields. Deep trench waveguide feeders require only one layer, but conventional bend structures lead to electromagnetic wave leakage, affecting transmission efficiency. Conventional cavity power divider structures also occupy a large space. Utility Model Content

[0010] The technical problem to be solved by this utility model is to provide a conversion structure between E-plane waveguide feed and deep groove waveguide feed, thereby solving at least one technical problem of the prior art.

[0011] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0012] A conversion structure between an E-plane waveguide feeder and a deep groove waveguide feeder includes an E-plane waveguide feeder, a deep groove waveguide feeder, and a transition structure. The E-plane waveguide feeder and the deep groove waveguide feeder are arranged perpendicularly to each other. The height of the deep groove waveguide feeder is higher than that of the E-plane waveguide feeder, and one end of the E-plane waveguide feeder and one end of the deep groove waveguide feeder partially overlap to form a transition via. The transition structure is located at the end of the deep groove waveguide feeder where the spacer connects to the E-plane waveguide feeder.

[0013] A conversion structure between an E-plane waveguide feed and a deep groove waveguide feed includes an E-plane waveguide feed, a first deep groove waveguide feed, and a second deep groove waveguide feed. The first and second deep groove waveguide feeds are respectively arranged perpendicular to the E-plane waveguide feed and symmetrically arranged on both sides of the E-plane waveguide feed. The height of the first and second deep groove waveguide feeds is higher than the height of the E-plane waveguide feed. One end of the E-plane waveguide feed partially overlaps with one end of the first and second deep groove waveguide feeds to form a transition through-hole. The transition structure is located at the end of the first and second deep groove waveguide feeds where the spacer connects to the E-plane waveguide feed.

[0014] A conversion structure for an E-plane waveguide feeder and a deep groove waveguide feeder includes an input E-plane waveguide feeder, an E-plane power divider structure, a first E-plane waveguide feeder, a second E-plane waveguide feeder, a third deep groove waveguide feeder, and a fourth deep groove waveguide feeder. One end of the input E-plane waveguide feeder is connected to the input end of the E-plane power divider structure. The two output ends of the E-plane power divider structure are respectively connected to one end of the first E-plane waveguide feeder and one end of the second E-plane waveguide feeder. The first E-plane waveguide feeder and the third deep groove waveguide feeder are arranged perpendicularly to each other, wherein the height of the third deep groove waveguide feeder is higher than that of the first E-plane waveguide feeder. The height of the first E-plane waveguide feed line and the third deep groove waveguide feed line are partially overlapped to form a transition through hole. The transition structure is set at the end of the third deep groove waveguide feed line where the spacer is connected to the first E-plane waveguide feed line. The second E-plane waveguide feed line and the fourth deep groove waveguide feed line are set perpendicular to each other. The height of the fourth deep groove waveguide feed line is higher than the height of the second E-plane waveguide feed line. The transition through hole is formed by the partial overlap of the second E-plane waveguide feed line and the third deep groove waveguide feed line. The transition structure is set at the end of the fourth deep groove waveguide feed line where the spacer is connected to the second E-plane waveguide feed line.

[0015] Furthermore, the E-plane waveguide feed line is equally divided into an upper half and a lower half, wherein the lower half of the E-plane waveguide feed line is located on the upper side of the first layer plate, the upper half of the E-plane waveguide feed line is located on the lower side of the second side plate, the deep groove waveguide feed line is located on the upper side of the second layer plate, and one end of the deep groove waveguide feed line is connected to one end of the E-plane waveguide feed line through a transition structure and a transition through hole.

[0016] Furthermore, the groove depth of the deep groove waveguide feed is 3.7 mm, the groove width of the deep groove waveguide feed is 2 mm, the height of the spacer of the deep groove waveguide feed is 1.4 mm, the width of the spacer of the deep groove waveguide feed is 0.6 mm, the width of the E-plane waveguide feed is 1.27 mm, and the height of the E-plane waveguide feed is 2.54 mm.

[0017] Furthermore, the transition structure includes a first-order impedance transformation structure, a second-order impedance transformation structure, and a third-order impedance transformation structure. The length of the first-order impedance transformation structure is 1.14 mm, the height of the first-order impedance transformation structure is 0.4 mm, the length of the second-order impedance transformation structure is 0.7 mm, the height of the second-order impedance transformation structure is 0.85 mm, the length of the third-order impedance transformation structure is 0.72 mm, the height of the third-order impedance transformation structure is 1.04 mm, and the width of the first-order, second-order, and third-order impedance transformation structures is 0.6 mm.

[0018] Furthermore, the width of the transition through hole is 0.67 mm, and the length of the transition through hole is 2 mm.

[0019] Furthermore, the transition structure includes a first-order impedance transformation structure and a second-order impedance transformation structure. The length of the first-order impedance transformation structure is 1.5 mm, and the height of the first-order impedance transformation structure is 0.66 mm. The length of the second-order impedance transformation structure is 1.1 mm, and the height of the second-order impedance transformation structure is 1.1 mm.

[0020] Furthermore, the width of the transition through hole is 0.87 mm, and the length of the transition through hole is 2 mm.

[0021] Furthermore, the transition structure includes a first-order impedance transformation structure, a second-order impedance transformation structure, and a third-order impedance transformation structure. The length of the first-order impedance transformation structure is 0.69 mm, and the height of the first-order impedance transformation structure is 0.33 mm. The length of the second-order impedance transformation structure is 0.56 mm, and the height of the second-order impedance transformation structure is 0.6 mm. The length of the third-order impedance transformation structure is 1.25 mm, and the height of the third-order impedance transformation structure is 0.92 mm. The width of the first-order impedance transformation structure, the second-order impedance transformation structure, and the third-order impedance transformation structure is 0.6 mm.

[0022] Furthermore, the width of the transition through hole is 0.67 mm, and the length of the transition through hole is 2 mm.

[0023] Compared with the prior art, this utility model has the following advantages and effects:

[0024] 1. This utility model adopts an E-plane waveguide feeder, which utilizes the characteristic that the current in the middle is zero. Separation will not cause electromagnetic wave leakage. When switching to a deep groove waveguide feeder, electromagnetic wave conversion can be achieved without welding.

[0025] 2. This utility model places the turning structure of the feed network on the E-plane feed line, and the feed line of the radiating structure is realized through a deep groove waveguide. Then, a transition structure between the two feed lines is designed to achieve efficient conversion between the two feed line modes.

[0026] 3. This utility model integrates the power divider structure with the two feeder mode conversion structure, thereby realizing the miniaturization of the power divider structure. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of Embodiment 1 of the conversion structure of E-plane waveguide feeder and deep groove waveguide feeder of this utility model.

[0028] Figure 2 This is a side view of Embodiment 1 of the conversion structure of E-plane waveguide feeder and deep groove waveguide feeder of this utility model.

[0029] Figure 3 This is a schematic diagram of S-parameters under different gaps in Embodiment 1 of the conversion structure of E-plane waveguide feeder and deep groove waveguide feeder of this utility model.

[0030] Figure 4 This is a schematic diagram of Embodiment 2 of the conversion structure of E-plane waveguide feeder and deep groove waveguide feeder of this utility model.

[0031] Figure 5 This is a side view of Embodiment 2 of the conversion structure between an E-plane waveguide feeder and a deep groove waveguide feeder according to this utility model.

[0032] Figure 6 This is a schematic diagram of S-parameters under different gaps in Embodiment 2 of the conversion structure of E-plane waveguide feeder and deep groove waveguide feeder of this utility model.

[0033] Figure 7 This is a schematic diagram of the transmission phase of Embodiment 2 of the conversion structure of E-plane waveguide feeder and deep groove waveguide feeder of this utility model.

[0034] Figure 8 This is a schematic diagram of Embodiment 3 of the conversion structure of E-plane waveguide feeder and deep groove waveguide feeder of this utility model.

[0035] Figure 9 This is a side view of Embodiment 3 of the conversion structure of an E-plane waveguide feeder and a deep groove waveguide feeder according to this utility model.

[0036] Figure 10 This is a schematic diagram of S-parameters under different gaps in Embodiment 3 of the conversion structure of E-plane waveguide feeder and deep groove waveguide feeder of this utility model.

[0037] Figure 11 This is a schematic diagram of the transmission phase of Embodiment 3 of the present invention, which is a conversion structure of an E-plane waveguide feeder and a deep groove waveguide feeder. Detailed Implementation

[0038] To elaborate on the technical solutions adopted by this utility model to achieve the intended technical objectives, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Furthermore, the technical means or technical features in the embodiments of this utility model can be replaced without creative effort. The utility model will be described in detail below with reference to the accompanying drawings and embodiments.

[0039] Example 1.

[0040] like Figure 1 and Figure 2 As shown, this utility model discloses a conversion structure between an E-plane waveguide feeder and a deep groove waveguide feeder. It employs a side-feed structure and includes an E-plane waveguide feeder 3, a deep groove waveguide feeder 4, and a transition structure. The E-plane waveguide feeder 3 and the deep groove waveguide feeder 4 are arranged perpendicularly to each other. The height of the deep groove waveguide feeder 4 is higher than the height of the E-plane waveguide feeder 3, and one end of the E-plane waveguide feeder 3 partially overlaps with one end of the deep groove waveguide feeder 4 to form a transition through-hole 5. The transition structure is located at the end where the spacer 6 of the deep groove waveguide feeder 4 connects to the E-plane waveguide feeder 3. Here, the height of the deep groove waveguide feeder 4 and the E-plane waveguide feeder 3 refers to the spatial height of their bottom surfaces.

[0041] The E-plane waveguide feed line 3 is divided into an upper half and a lower half of the E-plane waveguide feed line. The lower half of the E-plane waveguide feed line is located on the upper side of the first layer plate 1, and the upper half of the E-plane waveguide feed line is located on the lower side of the second side plate 2. The deep groove waveguide feed line 4 is located on the upper side of the second layer plate 2, and one end of the deep groove waveguide feed line 4 is connected to one end of the E-plane waveguide feed line 3 through a transition structure and a transition through hole 5.

[0042] The deep slot of the deep slot waveguide feed 4 has a depth of 3.7 mm and a width of 2 mm. The height of the spacer in the deep slot waveguide feed 4 is 1.4 mm, and the width of the spacer is 0.6 mm. Here, the height of the spacer refers to the distance from the top of the spacer to the bottom of the slot. The width of the E-plane waveguide feed 3 is 1.27 mm, and the height is 2.54 mm.

[0043] The transition structure comprises a first-order impedance transformation structure 7, a second-order impedance transformation structure 8, and a third-order impedance transformation structure 9. The first-order impedance transformation structure 7 has a length of 1.14 mm and a height of 0.4 mm. The second-order impedance transformation structure 8 has a length of 0.7 mm and a height of 0.85 mm. The third-order impedance transformation structure 9 has a length of 0.72 mm and a height of 1.04 mm. The widths of all three structures are 0.6 mm. The height of each structure refers to the distance from the top of the impedance transformation structure to the bottom of the slot in the deep slot waveguide feed line 4.

[0044] The width of the transition through hole 5 is 0.67 mm, and the length of the transition through hole 5 is 2 mm.

[0045] The antenna signal is excited and fed into the E-plane waveguide feed line 3 from the other end of the E-plane waveguide feed line 3. Then, the antenna signal passes through the transition via 5 and the transition structure at the other end of the E-plane waveguide feed line 3 and enters the deep groove waveguide feed line 4. Finally, the antenna signal is excited and output from the other end of the deep groove waveguide feed line 4.

[0046] The conversion structure between the E-plane waveguide feeder and the deep groove waveguide feeder of this utility model can be realized in the 77GHz frequency band through a two-layer structure, while the deep groove structure only requires a single layer. When the two-layer E-plane feeder is cut in the middle, there is no cutting current, so the leakage of electromagnetic waves is very small. It can be installed by hot melting, screwing and other processes.

[0047] like Figure 3 The diagram shows the S-parameters of a waveguide-to-groove waveguide conversion structure of this invention under different gaps. The S11 of the waveguide conversion in all three cases is below -15dB in the 75-81GHz frequency band. The transmission coefficient S21 of a 0.1mm gap deteriorates by only 0.1dB compared to a 0mm gap, and the transmission coefficient S21 of a 0.2mm gap deteriorates by 0.15dB compared to a 0mm gap. Therefore, this waveguide conversion has high-efficiency transmission performance.

[0048] Example 2.

[0049] like Figure 4 and Figure 5As shown, a conversion structure between an E-plane waveguide feed and a deep groove waveguide feed is provided. This structure employs a center-fed configuration and includes an E-plane waveguide feed 3, a first deep groove waveguide feed 10, and a second deep groove waveguide feed 11. The first deep groove waveguide feed 10 and the second deep groove waveguide feed 11 are respectively arranged perpendicular to the E-plane waveguide feed 3 and symmetrically on both sides of the E-plane waveguide feed 3. The heights of the first deep groove waveguide feed 10 and the second deep groove waveguide feed 11 are higher than the height of the E-plane waveguide feed 3. One end of the E-plane waveguide feed 3 partially overlaps with one end of the first deep groove waveguide feed 10 and the second deep groove waveguide feed 11 on both sides, forming transition vias 5. The transition structure is located at the end where the spacers of the first deep groove waveguide feed 10 and the second deep groove waveguide feed 11 connect to the E-plane waveguide feed 3.

[0050] The E-plane waveguide feed line 3 is divided into an upper half and a lower half. The lower half of the E-plane waveguide feed line is located on the upper side of the first layer plate 1, and the upper half of the E-plane waveguide feed line is located on the lower side of the second side plate 2. The first deep groove waveguide feed line 10 and the second deep groove waveguide feed line 11 are located on the upper side of the second layer plate 2, and one end of the first deep groove waveguide feed line 10 and the second deep groove waveguide feed line 11 are connected to one end of the E-plane waveguide feed line 3 through a transition structure and a transition through hole 5.

[0051] The groove depth of the first deep groove waveguide feed 10 and the second deep groove waveguide feed 11 is 3.7 mm, the groove width of the first deep groove waveguide feed 10 and the second deep groove waveguide feed 11 is 2 mm, the height of the spacer of the first deep groove waveguide feed 10 and the second deep groove waveguide feed 11 is 1.4 mm, and the width of the spacer of the first deep groove waveguide feed 10 and the second deep groove waveguide feed 11 is 0.6 mm. Here, the height of the spacer of the first deep groove waveguide feed 10 and the second deep groove waveguide feed 11 refers to the height of the top of the spacer from the bottom of the groove of the first deep groove waveguide feed 10 and the second deep groove waveguide feed 11. The width of the E-plane waveguide feed 3 is 1.27 mm, and the height of the E-plane waveguide feed 3 is 2.54 mm.

[0052] The transition structure includes a first-order impedance transformation structure 7 and a second-order impedance transformation structure 8. The length of the first-order impedance transformation structure 7 is 1.5 mm and the height is 0.66 mm. The length of the second-order impedance transformation structure 8 is 1.1 mm and the height is 1.1 mm.

[0053] The width of the transition through hole 5 is 0.87 mm, and the length of the transition through hole 5 is 2 mm.

[0054] The antenna signal is excited and fed into the E-plane waveguide feed line 3 from the other end of the E-plane waveguide feed line 3. Then, the antenna signal passes through the transition via 5 and the transition structure at the other end of the E-plane waveguide feed line 3 and enters the first deep groove waveguide feed line 10 and the second deep groove waveguide feed line 11. Finally, the antenna signal is excited and output from the other ends of the first deep groove waveguide feed line 10 and the second deep groove waveguide feed line 11, respectively.

[0055] The conversion structure between the E-plane waveguide feeder and the deep groove waveguide feeder of this utility model can be realized in the 77GHz frequency band through a two-layer structure, while the deep groove structure only requires a single layer. When the two-layer E-plane feeder is cut in the middle, there is no cutting current, so the leakage of electromagnetic waves is very small. It can be installed by hot melting, screwing and other processes.

[0056] like Figure 6 The diagram shows the S-parameters of a waveguide-to-groove waveguide conversion structure of this invention under different gaps. In all three cases, the S11 of the waveguide conversion is below -15dB in the 75-81GHz frequency band. The transmission coefficient S21 of a 0.1mm gap deteriorates by only 0.1dB compared to a 0mm gap, and the transmission coefficient S21 of a 0.2mm gap deteriorates by 0.15dB compared to a 0mm gap. Therefore, this waveguide conversion exhibits high transmission efficiency. The S11 of the waveguide conversion in all three cases is below -15dB in the 75-81GHz frequency band, with a transmission coefficient of around -3dB, indicating good transmission coefficient. The transmission coefficient S21 of a 0.1mm gap deteriorates by only 0.1dB compared to a 0mm gap, and the transmission coefficient S21 of a 0.2mm gap deteriorates by 0.2dB compared to a 0mm gap. Therefore, this waveguide conversion exhibits high transmission efficiency. Figure 7 As shown, the power divider formed by the conversion structure of the E-plane waveguide feeder and the deep groove waveguide feeder of this utility model has a transmission phase difference of 180°.

[0057] Example 3.

[0058] like Figure 8 and Figure 9As shown, a feed-through structure with a conversion structure between an E-plane waveguide and a deep groove waveguide includes an input E-plane waveguide feed line 12, an E-plane power divider structure 13, a first E-plane waveguide feed line 14, a second E-plane waveguide feed line 15, a third deep groove waveguide feed line 16, and a fourth deep groove waveguide feed line 17. One end of the input E-plane waveguide feed line 12 is connected to the input end of the E-plane power divider structure 13. The two output ends of the E-plane power divider structure 13 are respectively connected to one end of the first E-plane waveguide feed line 14 and one end of the second E-plane waveguide feed line 15. The first E-plane waveguide feed line 14 and the third deep groove waveguide feed line 16 are arranged perpendicularly to each other, wherein the height of the third deep groove waveguide feed line 16 is higher than that of the first E-plane waveguide feed line 17. The height of the first E-plane waveguide feed line 14 and the first E-plane waveguide feed line 14 partially overlap with the first end of the third deep groove waveguide feed line 16 to form a transition through hole 5. The transition structure is set at the end of the third deep groove waveguide feed line 16 where the spacer is connected to the first E-plane waveguide feed line 14. The second E-plane waveguide feed line 15 and the fourth deep groove waveguide feed line 17 are arranged perpendicular to each other. The height of the fourth deep groove waveguide feed line 17 is higher than the height of the second E-plane waveguide feed line 15. The second E-plane waveguide feed line 15 and the fourth deep groove waveguide feed line 17 partially overlap to form a transition through hole 5. The transition structure is set at the end of the fourth deep groove waveguide feed line 17 where the spacer is connected to the second E-plane waveguide feed line 15.

[0059] The first E-plane waveguide feed line 14 and the second E-plane waveguide feed line 15 are equally divided into an upper half and a lower half of the E-plane waveguide feed line. The lower half of the E-plane waveguide feed line is located on the upper side of the first layer plate 1, and the upper half of the E-plane waveguide feed line is located on the lower side of the second side plate 2. The third deep groove waveguide feed line 16 and the fourth deep groove waveguide feed line 17 are located on the upper side of the second layer plate 2, and one end of the third deep groove waveguide feed line 16 and the fourth deep groove waveguide feed line 17 is connected to one end of the first E-plane waveguide feed line 14 and the second E-plane waveguide feed line 15 through a transition structure and a transition through hole 5.

[0060] The depth of the slots in the third deep-slot waveguide feed 16 and the fourth deep-slot waveguide feed 17 is 3.7 mm, the width of the slots in the third deep-slot waveguide feed 16 and the fourth deep-slot waveguide feed 17 is 2 mm, the height of the spacers in the third deep-slot waveguide feed 16 and the fourth deep-slot waveguide feed 17 is 1.4 mm, and the width of the spacers in the third deep-slot waveguide feed 16 and the fourth deep-slot waveguide feed 17 is 0.6 mm. Here, the height of the spacers in the third deep-slot waveguide feed 16 and the fourth deep-slot waveguide feed 17 refers to the distance from the top of the spacer to the bottom of the slot in the third deep-slot waveguide feed 16 and the fourth deep-slot waveguide feed 17. The width of the first E-plane waveguide feed 14 and the second E-plane waveguide feed 15 is 1.27 mm, and the height of the first E-plane waveguide feed 14 and the second E-plane waveguide feed 15 is 2.54 mm.

[0061] The transition structure includes a first-order impedance transformation structure 7, a second-order impedance transformation structure 8, and a third-order impedance transformation structure 9. The length of the first-order impedance transformation structure 7 is 0.69 mm, and the height of the first-order impedance transformation structure 7 is 0.33 mm. The length of the second-order impedance transformation structure 8 is 0.56 mm, and the height of the second-order impedance transformation structure 8 is 0.6 mm. The length of the third-order impedance transformation structure 9 is 1.25 mm, and the height of the third-order impedance transformation structure 9 is 0.92 mm. The width of the first-order impedance transformation structure 7, the second-order impedance transformation structure 8, and the third-order impedance transformation structure 9 is 0.6 mm.

[0062] The width of the transition through hole 5 is 0.67 mm, and the length of the transition through hole 5 is 2 mm.

[0063] The antenna signal is excited and fed into the input E-plane waveguide feed line 12 from the other end of the input E-plane waveguide feed line 12. Then, at the other end of the E-plane waveguide feed line 3, the antenna signal is divided into two equal streams by the E-plane power divider structure 13 and fed into the first E-plane waveguide feed line 14 and the second E-plane waveguide feed line 15 respectively. The signals in the first E-plane waveguide feed line 14 and the second E-plane waveguide feed line 15 pass through the transition via 5 and the transition structure and enter the third deep slot waveguide feed line 16 and the fourth deep slot waveguide feed line 17 respectively. Finally, the antenna signal is excited and output from the other end of the third deep slot waveguide feed line 16 and the fourth deep slot waveguide feed line 17 respectively.

[0064] The conversion structure between the E-plane waveguide feeder and the deep groove waveguide feeder of this utility model can be realized in the 77GHz frequency band through a two-layer structure, while the deep groove structure only requires a single layer. When the two-layer E-plane feeder is cut in the middle, there is no cutting current, so the leakage of electromagnetic waves is very small. It can be installed by hot melting, screwing and other processes.

[0065] like Figure 10 The diagram shows the S-parameters of a waveguide-to-groove waveguide conversion structure of this invention under different gaps. The S11 of the waveguide conversion in all three cases is below -15dB in the 75-81GHz frequency band, with a transmission coefficient of around -3dB, indicating good transmission coefficient. The transmission coefficient S21 of a 0.1mm gap deteriorates by only 0.15dB compared to a 0mm gap, while the transmission coefficient S21 of a 0.2mm gap deteriorates by only 0.3dB compared to a 0mm gap. Therefore, this waveguide conversion exhibits high-efficiency transmission. Figure 11 As shown, the power divider formed by the conversion structure of the E-plane waveguide feeder and the deep groove waveguide feeder of this utility model has a transmission phase difference of 180°.

[0066] This invention employs an E-plane waveguide feeder, utilizing its zero-current characteristic to prevent electromagnetic wave leakage during separation. Switching to a deep-groove waveguide feeder eliminates the need for welding, enabling electromagnetic wave conversion. The invention places the turning structure of the feed network on the E-plane feeder, while the radiating structure is implemented via a deep-groove waveguide. A transition structure between the two feeder modes is designed, achieving efficient conversion. Furthermore, this invention integrates the power divider structure with the two feeder mode conversion structure, achieving miniaturization of the power divider structure.

[0067] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model's technical solution. Any simple modifications, equivalent substitutions, and improvements made to the above embodiments without departing from the scope of the present utility model's technical solution, based on the technical essence of the present utility model and within the spirit and principles of the present utility model, shall still fall within the protection scope of the present utility model's technical solution.

Claims

1. A conversion structure between an E-plane waveguide feeder and a deep trench waveguide feeder, characterized in that: It includes an E-plane waveguide feed line, a deep groove waveguide feed line, and a transition structure. The E-plane waveguide feed line and the deep groove waveguide feed line are arranged perpendicularly to each other. The height of the deep groove waveguide feed line is higher than that of the E-plane waveguide feed line, and one end of the E-plane waveguide feed line and one end of the deep groove waveguide feed line partially overlap to form a transition through hole. The transition structure is located at the end of the deep groove waveguide feed line where the spacer connects to the E-plane waveguide feed line.

2. The conversion structure between E-plane waveguide feed and deep trench waveguide feed according to claim 1, characterized in that: The transition structure includes a first-order impedance transformation structure, a second-order impedance transformation structure, and a third-order impedance transformation structure. The length of the first-order impedance transformation structure is 1.14 mm, and the height is 0.4 mm. The length of the second-order impedance transformation structure is 0.7 mm, and the height is 0.85 mm. The length of the third-order impedance transformation structure is 0.72 mm, and the height is 1.04 mm. The width of the first-order, second-order, and third-order impedance transformation structures is 0.6 mm.

3. The conversion structure between E-plane waveguide feed and deep trench waveguide feed according to claim 1, characterized in that: The width of the transition through hole is 0.67 mm, and the length of the transition through hole is 2 mm.

4. A conversion structure between an E-plane waveguide feeder and a deep groove waveguide feeder, characterized in that: It includes an E-plane waveguide feed line, a first deep groove waveguide feed line, and a second deep groove waveguide feed line. The first deep groove waveguide feed line and the second deep groove waveguide feed line are respectively arranged perpendicular to the E-plane waveguide feed line and symmetrically arranged on both sides of the E-plane waveguide feed line. The height of the first deep groove waveguide feed line and the second deep groove waveguide feed line is higher than the height of the E-plane waveguide feed line. The two sides of one end of the E-plane waveguide feed line partially overlap with one end of the first deep groove waveguide feed line and the second deep groove waveguide feed line to form a transition through hole. The transition structure is arranged at the end of the first deep groove waveguide feed line and the second deep groove waveguide feed line where the spacer is connected to the E-plane waveguide feed line.

5. The conversion structure between E-plane waveguide feed and deep trench waveguide feed according to claim 4, characterized in that: The transition structure includes a first-order impedance transformation structure and a second-order impedance transformation structure. The length of the first-order impedance transformation structure is 1.5 mm and the height is 0.66 mm. The length of the second-order impedance transformation structure is 1.1 mm and the height is 1.1 mm.

6. The conversion structure between E-plane waveguide feed and deep trench waveguide feed according to claim 4, characterized in that: The width of the transition through hole is 0.87 mm, and the length of the transition through hole is 2 mm.

7. A conversion structure between an E-plane waveguide feeder and a deep trench waveguide feeder, characterized in that: The system includes an input E-plane waveguide feed, an E-plane power divider structure, a first E-plane waveguide feed, a second E-plane waveguide feed, a third deep-groove waveguide feed, and a fourth deep-groove waveguide feed. One end of the input E-plane waveguide feed is connected to the input end of the E-plane power divider structure. The two output ends of the E-plane power divider structure are respectively connected to one end of the first E-plane waveguide feed and one end of the second E-plane waveguide feed. The first E-plane waveguide feed and the third deep-groove waveguide feed are arranged perpendicular to each other. The height of the third deep-groove waveguide feed is higher than the height of the first E-plane waveguide feed, and the first E-plane waveguide feed... One end of the feed line partially overlaps with one end of the third deep groove waveguide feed line to form a transition via. The transition structure is set at the end where the spacer of the third deep groove waveguide feed line connects to the first E-plane waveguide feed line. The second E-plane waveguide feed line and the fourth deep groove waveguide feed line are arranged perpendicularly to each other. The height of the fourth deep groove waveguide feed line is higher than the height of the second E-plane waveguide feed line, and one end of the second E-plane waveguide feed line partially overlaps with one end of the fourth deep groove waveguide feed line to form a transition via. The transition structure is set at the end where the spacer of the fourth deep groove waveguide feed line connects to the second E-plane waveguide feed line.

8. The conversion structure between E-plane waveguide feed and deep trench waveguide feed according to claim 7, characterized in that: The transition structure includes a first-order impedance transformation structure, a second-order impedance transformation structure, and a third-order impedance transformation structure. The length of the first-order impedance transformation structure is 0.69 mm, and the height is 0.33 mm. The length of the second-order impedance transformation structure is 0.56 mm, and the height is 0.6 mm. The length of the third-order impedance transformation structure is 1.25 mm, and the height is 0.92 mm. The width of each of the first-order, second-order, and third-order impedance transformation structures is 0.6 mm.

9. The conversion structure between E-plane waveguide feed and deep trench waveguide feed according to claim 7, characterized in that: The width of the transition through hole is 0.67 mm, and the length of the transition through hole is 2 mm.

10. The conversion structure between E-plane waveguide feed and deep trench waveguide feed according to claim 1, 4, or 7, characterized in that: The E-plane waveguide feed line is divided into an upper half and a lower half, with the lower half located on the upper side of the first layer plate and the upper half located on the lower side of the second side plate. The deep groove waveguide feed line is located on the upper side of the second layer plate, and one end of the deep groove waveguide feed line is connected to one end of the E-plane waveguide feed line through a transition structure and a transition through hole.

11. The conversion structure between E-plane waveguide feed and deep trench waveguide feed according to claim 1, 4, or 7, characterized in that: The deep groove waveguide feed has a groove depth of 3.7 mm, a groove width of 2 mm, a spacer height of 1.4 mm, a spacer width of 0.6 mm, an E-plane waveguide feed width of 1.27 mm, and an E-plane waveguide feed height of 2.54 mm.

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